@@ -3410,8 +3410,8 @@ find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
}
}
-/* A helper function that reads the .gdb_index from SECTION and fills
- in MAP. FILENAME is the name of the file containing the section;
+/* A helper function that reads the .gdb_index from BUFFER and fills
+ in MAP. FILENAME is the name of the file containing the data;
it is used for error reporting. DEPRECATED_OK is true if it is
ok to use deprecated sections.
@@ -3419,37 +3419,23 @@ find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
out parameters that are filled in with information about the CU and
TU lists in the section.
- Returns 1 if all went well, 0 otherwise. */
+ Returns true if all went well, false otherwise. */
static bool
-read_gdb_index_from_section (struct objfile *objfile,
- const char *filename,
- bool deprecated_ok,
- struct dwarf2_section_info *section,
- struct mapped_index *map,
- const gdb_byte **cu_list,
- offset_type *cu_list_elements,
- const gdb_byte **types_list,
- offset_type *types_list_elements)
-{
- const gdb_byte *addr;
- offset_type version;
- offset_type *metadata;
- int i;
-
- if (dwarf2_section_empty_p (section))
- return 0;
+read_gdb_index_from_buffer (struct objfile *objfile,
+ const char *filename,
+ bool deprecated_ok,
+ gdb::array_view<const gdb_byte> buffer,
+ struct mapped_index *map,
+ const gdb_byte **cu_list,
+ offset_type *cu_list_elements,
+ const gdb_byte **types_list,
+ offset_type *types_list_elements)
+{
+ const gdb_byte *addr = &buffer[0];
- /* Older elfutils strip versions could keep the section in the main
- executable while splitting it for the separate debug info file. */
- if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0)
- return 0;
-
- dwarf2_read_section (objfile, section);
-
- addr = section->buffer;
/* Version check. */
- version = MAYBE_SWAP (*(offset_type *) addr);
+ offset_type version = MAYBE_SWAP (*(offset_type *) addr);
/* Versions earlier than 3 emitted every copy of a psymbol. This
causes the index to behave very poorly for certain requests. Version 3
contained incomplete addrmap. So, it seems better to just ignore such
@@ -3502,9 +3488,9 @@ to use the section anyway."),
map->version = version;
- metadata = (offset_type *) (addr + sizeof (offset_type));
+ offset_type *metadata = (offset_type *) (addr + sizeof (offset_type));
- i = 0;
+ int i = 0;
*cu_list = addr + MAYBE_SWAP (metadata[i]);
*cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
/ 8);
@@ -3535,23 +3521,41 @@ to use the section anyway."),
return 1;
}
+/* Callback types for dwarf2_read_gdb_index. */
+
+typedef gdb::function_view
+ <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)>
+ get_gdb_index_contents_ftype;
+typedef gdb::function_view
+ <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)>
+ get_gdb_index_contents_dwz_ftype;
+
/* Read .gdb_index. If everything went ok, initialize the "quick"
elements of all the CUs and return 1. Otherwise, return 0. */
static int
-dwarf2_read_gdb_index (struct dwarf2_per_objfile *dwarf2_per_objfile)
+dwarf2_read_gdb_index
+ (struct dwarf2_per_objfile *dwarf2_per_objfile,
+ get_gdb_index_contents_ftype get_gdb_index_contents,
+ get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz)
{
const gdb_byte *cu_list, *types_list, *dwz_list = NULL;
offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0;
struct dwz_file *dwz;
struct objfile *objfile = dwarf2_per_objfile->objfile;
+ gdb::array_view<const gdb_byte> main_index_contents
+ = get_gdb_index_contents (objfile, dwarf2_per_objfile);
+
+ if (main_index_contents.empty ())
+ return 0;
+
std::unique_ptr<struct mapped_index> map (new struct mapped_index);
- if (!read_gdb_index_from_section (objfile, objfile_name (objfile),
- use_deprecated_index_sections,
- &dwarf2_per_objfile->gdb_index, map.get (),
- &cu_list, &cu_list_elements,
- &types_list, &types_list_elements))
+ if (!read_gdb_index_from_buffer (objfile, objfile_name (objfile),
+ use_deprecated_index_sections,
+ main_index_contents, map.get (), &cu_list,
+ &cu_list_elements, &types_list,
+ &types_list_elements))
return 0;
/* Don't use the index if it's empty. */
@@ -3567,12 +3571,18 @@ dwarf2_read_gdb_index (struct dwarf2_per_objfile *dwarf2_per_objfile)
const gdb_byte *dwz_types_ignore;
offset_type dwz_types_elements_ignore;
- if (!read_gdb_index_from_section (objfile,
- bfd_get_filename (dwz->dwz_bfd), 1,
- &dwz->gdb_index, &dwz_map,
- &dwz_list, &dwz_list_elements,
- &dwz_types_ignore,
- &dwz_types_elements_ignore))
+ gdb::array_view<const gdb_byte> dwz_index_content
+ = get_gdb_index_contents_dwz (objfile, dwz);
+
+ if (dwz_index_content.empty ())
+ return 0;
+
+ if (!read_gdb_index_from_buffer (objfile,
+ bfd_get_filename (dwz->dwz_bfd), 1,
+ dwz_index_content, &dwz_map,
+ &dwz_list, &dwz_list_elements,
+ &dwz_types_ignore,
+ &dwz_types_elements_ignore))
{
warning (_("could not read '.gdb_index' section from %s; skipping"),
bfd_get_filename (dwz->dwz_bfd));
@@ -6154,6 +6164,28 @@ const struct quick_symbol_functions dwarf2_debug_names_functions =
dw2_map_symbol_filenames
};
+/* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
+ to either a dwarf2_per_objfile or dwz_file object. */
+
+template <typename T>
+static gdb::array_view<const gdb_byte>
+get_gdb_index_contents_from_section (objfile *obj, T *section_owner)
+{
+ dwarf2_section_info *section = §ion_owner->gdb_index;
+
+ if (dwarf2_section_empty_p (section))
+ return {};
+
+ /* Older elfutils strip versions could keep the section in the main
+ executable while splitting it for the separate debug info file. */
+ if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0)
+ return {};
+
+ dwarf2_read_section (obj, section);
+
+ return {section->buffer, section->size};
+}
+
/* See symfile.h. */
bool
@@ -6197,7 +6229,9 @@ dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind)
return true;
}
- if (dwarf2_read_gdb_index (dwarf2_per_objfile))
+ if (dwarf2_read_gdb_index (dwarf2_per_objfile,
+ get_gdb_index_contents_from_section<struct dwarf2_per_objfile>,
+ get_gdb_index_contents_from_section<dwz_file>))
{
*index_kind = dw_index_kind::GDB_INDEX;
return true;